Herbs, perennial, with woody or fibrous-fleshy taproot, 5–12 mm thick. Stems decumbent, ascending, or erect, few to many emerging from woody crown, 5–25(–50) cm, glabrous. Leaves opposite; stipules connate into deltate scale, 0.2–0.5 mm, minutely lacerate at apex, glabrous; petiole 0–0.2(–0.3) mm, glabrous; blade orbiculate-reniform to acute-cordate, 2–5(–8) × 2–5(–6) mm, base ± asymmetric, cordate to auriculate, sometimes clasping stem, margins entire, apex narrowly acute, surfaces glabrous; 2-or 3-veined from base, but usually only midvein conspicuous. Cyathia solitary at distal nodes; peduncle 0.3–1(–1.5) mm. Involucre broadly campanulate, 0.8–1.4 × 0.9–1.4 mm, glabrous; glands 4, yellow-green to brownish, oblong, 0.2–0.3 × 0.5–0.7 mm; appendages white, flabellate to oblong, 0.1–0.2(–0.5) × 0.4–0.8 mm, distal margin entire or dentate-crenate. Staminate flowers 22–26. Pistillate flowers: ovary glabrous; styles 0.3–0.4 mm, unbranched, thickened-clavate. Capsules ovoid and broadly triangular, 1.5–1.9(–2.5) × 1.4–1.6(–2.2) mm, glabrous; columella 1.2–1.8 mm. Seeds white, oblong, 4-angled in cross section, adaxial faces slightly concave, with long raphe between, 1.5–1.8 × 0.7–1 mm, markedly foveolate, with irregular to ± parallel or anastomosing ridges. 2n = 28.
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